diff --git a/lib/core/settings.py b/lib/core/settings.py
index f29c7c69c..8aa3fd9db 100755
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -19,7 +19,7 @@ from lib.core.enums import DBMS_DIRECTORY_NAME
 from lib.core.enums import OS
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.0.11.12"
+VERSION = "1.0.11.13"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/lib/techniques/blind/inference.py b/lib/techniques/blind/inference.py
index 6e3d34233..0cf0e95cb 100644
--- a/lib/techniques/blind/inference.py
+++ b/lib/techniques/blind/inference.py
@@ -94,8 +94,7 @@ def bisection(payload, expression, length=None, charsetType=None, firstChar=None
             return 0, retVal
 
     try:
-        # Set kb.partRun in case "common prediction" feature (a.k.a. "good
-        # samaritan") is used or the engine is called from the API
+        # Set kb.partRun in case "common prediction" feature (a.k.a. "good samaritan") is used or the engine is called from the API
         if conf.predictOutput:
             kb.partRun = getPartRun()
         elif hasattr(conf, "api"):
@@ -107,8 +106,10 @@ def bisection(payload, expression, length=None, charsetType=None, firstChar=None
             firstChar = len(partialValue)
         elif "LENGTH(" in expression.upper() or "LEN(" in expression.upper():
             firstChar = 0
-        elif dump and conf.firstChar is not None and (isinstance(conf.firstChar, int) or (isinstance(conf.firstChar, basestring) and conf.firstChar.isdigit())):
+        elif (kb.fileReadMode or dump) and conf.firstChar is not None and (isinstance(conf.firstChar, int) or (isinstance(conf.firstChar, basestring) and conf.firstChar.isdigit())):
             firstChar = int(conf.firstChar) - 1
+            if kb.fileReadMode:
+                firstChar *= 2
         elif isinstance(firstChar, basestring) and firstChar.isdigit() or isinstance(firstChar, int):
             firstChar = int(firstChar) - 1
         else:
diff --git a/txt/checksum.md5 b/txt/checksum.md5
index 630f6f50d..b76c2d1f6 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -45,7 +45,7 @@ e60456db5380840a586654344003d4e6  lib/core/readlineng.py
 b3a62d41a5af6cd7fa733b6227febb0c  lib/core/replication.py
 99a2b496b9d5b546b335653ca801153f  lib/core/revision.py
 7c15dd2777af4dac2c89cab6df17462e  lib/core/session.py
-77d181efc08bd6d3d97646e98f080b89  lib/core/settings.py
+7f7273907a344eddfae58c91a02171c4  lib/core/settings.py
 7af83e4f18cab6dff5e67840eb65be80  lib/core/shell.py
 23657cd7d924e3c6d225719865855827  lib/core/subprocessng.py
 c3ace7874a536d801f308cf1fd03df99  lib/core/target.py
@@ -86,7 +86,7 @@ cc9c82cfffd8ee9b25ba3af6284f057e  lib/takeover/__init__.py
 7d6cd7bdfc8f4bc4e8aed60c84cdf87f  lib/takeover/udf.py
 d9bdcc17091374c53ad2eea7fd72a909  lib/takeover/web.py
 9af83a62de360184f1c14e69b8a95cfe  lib/takeover/xp_cmdshell.py
-c066bd01bd02135841e4f6875644ebd2  lib/techniques/blind/inference.py
+0ad6fbd71649f736083c00e58de750b9  lib/techniques/blind/inference.py
 cc9c82cfffd8ee9b25ba3af6284f057e  lib/techniques/blind/__init__.py
 cc9c82cfffd8ee9b25ba3af6284f057e  lib/techniques/brute/__init__.py
 d36effffe64e63ef9b3be490f850e2cc  lib/techniques/brute/use.py